Is the 6.6 Duramax diesel a good engine?
The 6.6 Duramax diesel engine is a popular and well-regarded powerplant found in many heavy-duty pickup trucks and commercial vehicles. Overall, it is considered a good engine that offers impressive power, durability, and fuel efficiency. However, as with any engine, there are pros and cons to consider when evaluating its performance and suitability for your needs.
Power and Performance
The 6.6 Duramax diesel is known for its robust power output, with up to 445 horsepower and 910 lb-ft of torque in its latest iterations. This makes it well-suited for towing heavy loads, hauling large payloads, and tackling demanding off-road conditions. The engine's strong low-end torque also provides excellent acceleration and responsiveness, even when the vehicle is heavily loaded.
Fuel Efficiency
Diesel engines, including the 6.6 Duramax, generally offer better fuel efficiency compared to their gasoline counterparts. The 6.6 Duramax can achieve up to 30 mpg on the highway, depending on the specific vehicle configuration and driving conditions. This can result in significant fuel cost savings, especially for those who use their trucks for heavy-duty applications or long-distance driving.
Durability and Reliability
The 6.6 Duramax is known for its robust construction and excellent durability, with many engines lasting well over 200,000 miles with proper maintenance. The engine's heavy-duty components, such as the cast-iron block and forged steel crankshaft, contribute to its long-term reliability. However, as with any engine, proper maintenance and care are essential to ensure the 6.6 Duramax continues to perform at its best.
Potential Drawbacks
While the 6.6 Duramax is generally considered a good engine, there are a few potential drawbacks to consider:
- Noise and Vibration: Diesel engines, including the 6.6 Duramax, can be louder and produce more vibration than their gasoline counterparts. This may be a concern for some drivers who prioritize a quieter cabin environment.
- Emissions and Maintenance: Diesel engines typically require more complex emissions control systems and may require more frequent maintenance, such as oil changes and particulate filter cleanings, to maintain optimal performance and emissions compliance.
- Higher Upfront Cost: Diesel engines, including the 6.6 Duramax, often have a higher initial purchase price compared to gasoline engines. This may be a consideration for some buyers, especially those who do not require the additional power and towing capacity that a diesel engine provides.
Overall, the 6.6 Duramax diesel engine is a well-regarded and capable powerplant that offers impressive power, fuel efficiency, and durability. While it may not be the best choice for every application, it is an excellent option for those who require the additional capabilities that a diesel engine can provide.
What year is Duramax most reliable?
LBZ: 2006 – 2007
The LBZ is also incredibly reliable; it's built stronger and more durable than previous Duramax engines. Their only weakness is that their pistons are known to crack if you surpass 600 horsepower output.
Which Duramax is the most reliable?
The LBZ
The LBZ is also the last generation of Duramax without emissions control parts, making it more reliable than any subsequent engine. For those reasons, it is our choice for the best Duramax engine.
How many miles between oil changes on a 6.6 Duramax diesel?
Duramax 6.6-Liter Maintenance Schedule
Oil and filter change at 10,000 miles or when you see the “Change engine oil” message.
What is the biggest problem with Duramax?
One of the biggest complaints on the LLY is it has a tendency to overheat, especially when the truck is being worked hard with a heavier trailer or on a hot summer day. While it may not be the first place you think to look, the stock air intake system can actually contribute to a hotter running LLY Duramax.
What year Duramax is most reliable?
LBZ: 2006 – 2007
The LBZ is also incredibly reliable; it's built stronger and more durable than previous Duramax engines. Their only weakness is that their pistons are known to crack if you surpass 600 horsepower output.
How many miles will a 6.6 Duramax last?
When it comes to Duramax 6.6L engines, hitting over 300,000 miles or 480,000 km is often seen as high mileage, but this can vary based on maintenance and overall truck condition. With proper care, these engines can keep going strong for up to 500,000 miles or 800,000 km.
What's better, 6.6 gas or diesel?
Diesel Engine (6.6L Duramax V8):
Higher towing capacity (up to 22,430 lbs) Significantly more torque (975 lb-ft) Better fuel efficiency. Longer engine lifespan.
What year to avoid 6.6 Duramax?
Although Duramax is a reliable engine, older engines are not that reliable. Duramax engines from 2001-2010 are prone to many issues hampering it's reliability. Thankfully, newer models of that engine that are manufactured between 2011-2023 are reliable enough.
What year did Duramax have injector problems?
2001 – 2004
LB7: 2001 – 2004
Injector failure was a common problem on the LB7 engines. GM even recognized the problem as they eventually corrected the original design and offered a 200,000-mile warranty on the updated Duramax parts.
Is the 6.6 Duramax better than the 6.7 Power Stroke?
Towing Capacity: The Powerstroke engine has a slightly higher towing capacity. The 6.6 Duramax can tow up to approximately 35,500 pounds, while the 6.7 Powerstroke can tow up to around 37,000 pounds. Fuel Efficiency: The 6.6L Duramax Diesel may average 17 mpg in the city, 22 mpg on open roads, and 20 mpg combined.
